SFI SYSTEM, Diagnostic DTC:P0037,P0038 and P0054
| DTC Code | DTC Name |
|---|---|
| P0037 | HO2S Heater Control Circuit Low Bank 1 Sensor 2 |
| P0038 | HO2S Heater Control Circuit High Bank 1 Sensor 2 |
| P0054 | HO2S Heater Resistance Bank 1 Sensor 2 |
DESCRIPTION
Refer to DTC P0136.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
|---|---|---|---|---|---|
P0037 |
HO2S Heater Control Circuit Low Bank 1 Sensor 2 |
Open or short to ground in heated oxygen sensor (sensor 2) heater circuit. |
|
Comes on |
DTC stored |
P0038 |
HO2S Heater Control Circuit High Bank 1 Sensor 2 |
Short to +B in heated oxygen sensor (sensor 2) heater circuit. |
|
Comes on |
DTC stored |
P0054 |
HO2S Heater Resistance Bank 1 Sensor 2 |
Open in heated oxygen sensor (sensor 2) heater circuit or heater resistance too high while engine running. |
|
Comes on |
DTC stored |
MONITOR DESCRIPTION
These DTCs are stored when a malfunction is detected in the heated oxygen sensor (sensor 2) heater circuit. If there is an open or short in the heated oxygen sensor (sensor 2) heater circuit, or the heater resistance is abnormal, the ECM will illuminate the MIL and store a DTC.
WIRING DIAGRAM
Refer to DTC P0031.
CAUTION / NOTICE / HINT
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
PROCEDURE
INSPECT HEATED OXYGEN SENSOR (SENSOR 2) (HEATER RESISTANCE)
Inspect the heated oxygen sensor (sensor 2).
Result
Proceed to
OK
NG
CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR (SENSOR 2) - ECM)
Disconnect the heated oxygen sensor (sensor 1 and sensor 2) connectors.
Disconnect the purge VSV connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
B52-1 (+B) - B55-41 (+B)
Always
Below 1 Ω
B52-2 (HT1B) - B55-4 (HT1B)
Always
Below 1 Ω
B52-1 (+B), B35-1 (+B), B48-2 or B55-41 (+B) - Body ground and other terminals
Always
10 kΩ or higher
B52-2 (HT1B) or B55-4 (HT1B) - Body ground and other terminals
Always
10 kΩ or higher
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK WHETHER DTC OUTPUT RECURS (DTC P0037, P0038 OR P0054)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
Powertrain > Engine > Clear DTCs
Turn the ignition switch off and wait for a few minutes.
Perform the drive test.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Check for DTCs.
Powertrain > Engine > Trouble Codes
Result
Result
Proceed to
DTC P0037, P0038 or P0054 is output
A
DTCs are not output
B